Float Switches

Float switches regulate the liquid level in tanks, wells, etc. and are used for automatic level control of groundwater, wastewater and sewage pumps, for raw water and liquid transfer pumps at waterworks, and for high water alarm.


What does a float switch consist of?


Float switches have a reed switch and a pivoted magnet and can be used for normally open (N/O) or normally closed (N/C) operation. The switch action can be reversed rotating the switch through 180°. The movement of float, due to changing fluid level, will cause the reed change to work (for instance close or open) at a specific level. This trusted and tried technology depends on a generally straightforward plan that offers long-haul quality without the requirement for the user to calibrate a switch.


What are material types of a float switch?


  • Nylon – used for oils, diesel, organic chemicals

  • Polypropylene (PP) – acids and alkali, detergents, oils, water, organic chemicals

  • Polyphenylene sulphide (PPS) – used for more aggressive chemicals, and higher temperatures, up to 120ºC

  • Stainless steel – medical and food industries, hydraulic fluids, chemicals

Features and Benefits


  • The highly flexible thermoplastic rubber cable has an extremely high mechanical load rating

  • The drop shape of the stabilizing weight eccentrically mounted in the housing makes the float switch insensitive to turbulence

  • The microswitch, fitted in a dual-chamber system, is completely shock- and rupture-proof

Where can be float switches used?


  • when emptying a tank

  • when filling a tank

  • for alarm at high water level

  • for alarm at low water level

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Description Price Device Type For Use With Mounting Type Switch Output Body Material Cable Length Minimum Operating Temperature Maximum Operating Temperature Maximum AC Voltage Maximum DC Voltage Maximum Current Maximum Pressure Gasket Material Current Rating
RS庫存編號 228-1986
製造零件編號RSF33W100RC
BrandCynergy3
HK$153.10
單位
Float - Horizontal NO/NC Nylon 1m -20°C +75°C - - 5 A - Nitrile -
RS庫存編號 288-9322
製造零件編號RSF76Y050TV
BrandCynergy3
HK$189.01
單位
Float - Horizontal External NO/NC Polyphenylene Sulfide 500mm -10°C +120°C - - 600 mA - Silicone, Viton -
RS庫存編號 348-8009
製造零件編號RSF66A25B125
BrandCynergy3
HK$335.40
單位
Float - Vertical Direct Load Polyphenylene Sulfide 1m -10°C +85°C - - 600 mA - Nitrile -
RS庫存編號 339-5238
製造零件編號LFL2-CK-U-PVC5
HK$503.66
單位
Float - Horizontal Direct Load Polypropylene 5m +5°C +70°C - - 1 A dc, 3 A ac 3bar - -
RS庫存編號 859-3333
製造零件編號FSH-21
HK$301.08
單位
Float Switch - Horizontal SPST Polypropylene - -20°C +80°C - - 0.5 (Switching) A, 1 (Carrying) A 57psi - -
RS庫存編號 454-9082
製造零件編號LM10C
BrandCynergy3
HK$1,126.16
單位
Float - - Direct Load PE 5m 0°C +55°C - - 1 A dc, 4 A ac 10bar - -
RS庫存編號 348-7983
製造零件編號RSF66A25B75
BrandCynergy3
HK$383.43
單位
Float - Vertical Direct Load Polyphenylene Sulfide 1m -10°C +85°C - - 600 mA - Nitrile -
RS庫存編號 756-4144
製造零件編號SSF217XPM12
BrandCynergy3
HK$927.59
單位
Float - Horizontal NO/NC Stainless Steel - - +120°C - - 500 mA 5bar - -
RS庫存編號 756-4138
製造零件編號SSF214X100
BrandCynergy3
HK$710.05
單位
Float - Horizontal NO/NC Stainless Steel 1m - - - - 500 mA 10bar - -
RS庫存編號 379-4017
製造零件編號MS10BW
BrandCynergy3
HK$381.63
單位
Float - - Direct Load PE 5m 0°C +55°C - - 1 A dc, 4 A ac 10bar - -
RS庫存編號 348-8015
製造零件編號RSF66A25B150
BrandCynergy3
HK$404.38
單位
Float - Vertical Direct Load Polyphenylene Sulfide - -10°C +85°C - - 600 mA - Nitrile -
RS庫存編號 339-5216
製造零件編號LFL1-BK-N-PVC5
HK$551.46
單位
Float - Horizontal NAMUR Polypropylene 5m -20°C +70°C - - 2.2 mA 2bar - -
RS庫存編號 519-232
BrandRS PRO
HK$51.52
單位
Float - Vertical Direct Load PP 300mm -20°C +80°C 250V 200V 700 mA - - -
RS庫存編號 338-9744
製造零件編號RSF74Y100RN
BrandCynergy3
HK$134.81
單位
Float - Horizontal External NO/NC Polypropylene 1m -20°C +100°C - - 600 mA - Nitrile -
RS庫存編號 869-7586
製造零件編號RSF78YNP
BrandCynergy3
HK$129.69
單位
Float - Horizontal NO/NC Polypropylene - -20°C +100°C 240V 120V 600 mA - Nitrile -
RS庫存編號 756-4160
製造零件編號SSV66A150E1GP
BrandCynergy3
HK$900.45
單位
Float - Vertical NO/NC Stainless Steel - - - - - 500 mA 20bar - -
RS庫存編號 361-1849
製造零件編號FFSMC10CU
BrandCynergy3
HK$1,254.94
單位
Float - - Direct Load PE 5m 0°C +55°C - - 1 A dc, 4 A ac 10bar - -
RS庫存編號 845-998
製造零件編號RSF54V100MC
BrandCynergy3
HK$126.53
單位
Float - Vertical NO/NC Polypropylene 1m -20°C +100°C - - 600 mA - Nitrile -
RS庫存編號 519-258
BrandRS PRO
HK$45.46
單位
Float - Vertical Direct Load PP 300mm -20°C +80°C 250V 200V 700 mA - - -
RS庫存編號 725-9943
製造零件編號RSF78Y100RN
BrandCynergy3
HK$141.50
單位
Float - Horizontal External NO/NC Polypropylene 1m -20°C +100°C - - 600 mA - Nitrile -